Dear sir, i am at the age of 30, and just now only i married. i am from india. i have self satifying habit for the past 10 years. now my problem is during having sex my penis does not stood erect for more than 3 minutes. also i am satisfied within that 2 or 3 minutes. and within that 2 min all my skin on the penis removes and after that i am unable to have sex its paining. but with in that semen releases. please help me what medicine to take for this problem